mr. obama by name. >> we should not continue on the same path, but it's time to take a new path, a bold aggressive change. >> reporter: meanwhile, paul ryan and his wife, jana, spent halloween in their hometown in janesville, wisconsin, taking their kids trick-or-treating. a new nbc news/maris poll shows a tightening in key states, the president still holds leads in three of them. in iowa, president obama maintains a six-point lead over mitt romney, down from eight two weeks ago. in wisconsin, romney has cut the president's lead in half. he now trails by just three points. and in new hampshire, it's basically a dead heat. the president at 49%, romney with 47%. the granite state will be mitt romney's final stop before election day. i believe schedules sometimes mean more than polls and the president's final scheduling, the final day matt, the president will be in wisconsin, ohio and iowa. that tells that's where they think they either win or lose this election. >> chuck todd in washington.